5905-00-539-4903 RESISTOR,VARIABLE,NONWIRE WOUND,NONPRECI Index 3120-00-539-4911 BUSHING,SLEEVE

National Stock Number:
5925-00-539-4910

Federal Supply Class:
5925

National Item Identification Number:
005394910

Description:
CIRCUIT BREAKER

Detail:
A DEVICE WITH MEANS OTHER THAN FUSES FOR AUTOMATICALLY OPENING THE CIRCUIT IN WHICH IT IS INSTALLED WHEN THE CURRENT VARIES FROM THE PREDETERMINED VALUE FOR WHICH THE DEVICE IS SET. MAY INCLUDE PROVISIONS FOR MANUAL OPERATION. AT LEAST ONE SET OF CONTACTS MUST BE IN SERIES WITH THE ACTUATING ELEMENT(S). A COMBINATION OF SEMICONDUCTOR AND PASSIVE DEVICES MAY BE USED IN LIEU OF CONTACTS. FOR AUTOMATICALLY OPERATED ITEMS IN WHICH THE ACTUATING (TRIPPING) ELEMENT AND CONTACTS ARE NOT IN SERIES, SEE RELAY (AS MODIFIED). FOR ITEMS WHICH ARE OPERATED BOTH MANUALLY AND AUTOMATICALLY BUT THE ACTUATING ELEMENTS AND CONTACT ARE NOT IN SERIES, SEE RELAY-SWITCH. EXCLUDES CIRCUIT BREAKER BOX AND MAGNETO "BREAKER" ASSEMBLIES. SEE ALSO SWITCH (AS MODIFIED); AND CONTROLLER.


Manufacturer Information:
DKN3079500WESTINGHOUSE ELECTRIC CORP
MILC1758781349MILITARY SPECIFICATIONS PROMULGATED BY MILITARY DEPARTMENTS/AGENCIES UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M


Techincal Specification:
POLE QUANTITY2
MAXIMUM CONTINUOUS LOAD CURRENT RATING PER POLE250.0 AMPERES DC ALL LOCATIONS
CIRCUIT PROTECTION TYPEOVERCURRENT ALL LOCATIONS
TERMINAL TYPE AND QUANTITY4 BUS BAR
OPERATING VOLTAGE TYPE AND RATING PER POLE IN VOLTS250.0 DC ALL LOCATIONS
TRIP RELEASE CHARACTERISTICINSTANTANEOUS AND
TIME DELAY ALL LOCATIONS
RESET METHODMANUAL
MOUNTING FACILITY TYPE AND QUANTITY6 UNTHREADED HOLE
TRIP RELEASE METHODMAGNETIC ALL LOCATIONS
MAXIMUM INTERRUPTING CAPACITY CURRENT TYPE AND RATING PER POLE IN AMPS30000.0 DC ALL LOCATIONS
MAIN CONTACT TRIPPING MECHANISM TYPETRIP FREE
UNTHREADED MOUNTING HOLE DIAMETER0.562 INCHES NOMINAL
MANUAL ACTUATOR TYPE AND QUANTITY1 ROTARY
FEATURES PROVIDEDADJUSTABLE TRIP RELEASE
ADJUSTABLE TRIP SETTING CURRENT RANGE PER POLE IN AMPS250.0 TO 500.0 DC ALL LOCATIONS
NONDEFINITIVE SPEC/STD DATAACB TYPE
REFERENCE NUMBER DIFFERENTIATING CHARACTERISTICSAS DIFFERENTIATED BY MAXIMUM CONTINUOUS LOAD CURRENT RATING PER POLE,OPERATING VOLTAGE TYPE AND RATING PER POLE IN VOLTS
SPEC/STD CONTROLLING DATA
MANUFACTURERS CODE81349
NON-DEFINITIVE GOVERNMENT SPEC/STD REFERENCEMILC17587
THE MANUFACTURERS DATA
MANUFACTURERS CODE79500
DESIGN CONTROL REFERENCEDKN30


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